Aquarium gang valve



FIG. 1 is a perspective view taken from the top, front and right side of an aquarium gang valve showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear elevational view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a aquarium gang valve, as shown and described. 